The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 2002
Filed:
Jul. 08, 1998
Toshihiro Ueta, Mishima, JP;
Kazuo Nagashima, Shizuoka-ken, JP;
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Abstract
A history of function values of a spindle rotation frequency in each time period from present to past is stored in a data table D and corrective coefficients are stored in advance in a corrective coefficient table C relating the coefficients to the location in the data table D. Each location and corrective coefficient are read out from the corrective coefficient table C and the function value of the spindle rotation frequency corresponding to the location is read out from the data table D. The compensation value is calculated from the total sum of each product of the function value and the corrective coefficient in each location and compensate the NC command position with the compensation value.